It would be nice if we had one or two more characters that had healing skills.
You could even have the skill work like Modern Storm’s black skill. But, instead of laying down individual attack tiles, the hero would lay down heal tiles (which could be broken by the enemy). The healing effect (could) only work on the current lead character. Making the user weigh the ‘risk v reward’ of trying to heal a low HP character and risking that character losing more HP’s on the following enemy’s turn.